PT Tech, LLC
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
2
Ending by 2030
Sep 2030
Next term end
When these terms end
Held patents by the year their term ends
20262027202820292030203120322033203420352036203720382039204020412042204320442045
Fee deadlines
Maintenance fees fall due 3.5, 7.5 and 11.5 years after grant. A missed fee ends a patent at the end of the six month grace period that follows, not on the due date.
- 1 fee due Feb 4, 2027The maintenance fee for Wind turbine torque limiting clutch system (US 9,097,239) comes due Feb 4, 2027. Unpaid by Aug 4, 2027, it lapses early.
- 1 fee due Apr 29, 2027The maintenance fee for Wind turbine coupling to mitigate torque reversals (US 10,458,395) comes due Apr 29, 2027. Unpaid by Oct 29, 2027, it lapses early.
Recent changes
- 2 of the patents on this record were granted since Aug 16, 2026
Patents held now
Soonest term end first. Each date below is computed on that patent's own page, which shows the rule, the adjustments and the fee history it was derived from.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,066,619 | Clutch control system In force · From the USPTO record | In force | From the USPTO record | |
| US 8,715,092 | Compact disc spring torque limiter In force · From the USPTO record | In force | From the USPTO record | |
| US 8,474,589 | Compact universal fluid-actuated clutch In force · From the USPTO record | In force | From the USPTO record | |
| US 9,097,239 | Wind turbine torque limiting clutch system In force · From the USPTO record | In force | From the USPTO record | |
| US 8,932,017 | Wind turbine torque limiting clutch system In force · From the USPTO record | In force | From the USPTO record | |
| US 11,293,409 | Wind turbine coupling to mitigate torque reversals In force · From the USPTO record | In force | From the USPTO record | |
| US 10,240,648 | Electromagnetic-Released, Multi-Disc Enclosed Safety Brake In force · High confidence | In force | High confidence | |
| US 10,240,643 | Self-Contained Clutch for Diesel Engines In force · High confidence | In force | High confidence | |
| US 10,458,395 | Wind turbine coupling to mitigate torque reversals In force · From the USPTO record | In force | From the USPTO record | |
| US 12,055,190 | Method and Apparatus for Efficient Clutch Engagement In force · High confidence | In force | High confidence |
Also on record, not counted in the 12: 2 lapsed for an unpaid fee · 4 ended at full term. List them
Sources and methods
Compiled from the USPTO record, grants, published applications and recorded assignments, not yet reviewed by hand.
How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
Published applications
US patent applications published under this name that have not become patents. An application is published about eighteen months after its earliest filing; one that has not been published is in no public record.
1 abandoned · 1 no status recorded